Triethylamine → Diisopropyl Ether

Participants

Reaction Steps

Nα-[(1,4-Dichloro-7-isoquinolinyl)sulphonyl]-Nε-tert-butyloxycarbonyl-L-lysine tert-butyl ester ##STR190## A solution of 1,4-dichloro-7-isoquinolinylsulphonyl chloride (250 mg, 0.84 mmol), Ne-tert-butyloxycarbonyl-L-lysine tert-butyl ester hydrochloride (286 mg, 0.84 mmol) and triethylamine (235 μl, 1.69 mmol) in CH2Cl2 (25 ml) was stirred at 23° C. for 3h. The reaction mixture was washed with water (2×20 ml), dried (MgSO4) and concentrated in vacuo to a residue which upon trituration with hexane and then i-Pr2O gave Nα-[(1,4-dichloro-7-isoquinolinyl)sulphonyl]-Nε-tert-butyloxycarbonyl-L-lysine tert-butyl ester as a white powder (270 mg, 0.48 mmol).

Provenance & Evidence